package components;

/*
 * Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle or the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

import java.awt.BorderLayout;
import java.awt.Insets;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.Random;

import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.ProgressMonitor;
import javax.swing.SwingWorker;

public class ProgressMonitorDemo extends JPanel implements ActionListener, PropertyChangeListener {

  private static final long serialVersionUID = 1L;
  
	private ProgressMonitor progressMonitor;
	private JButton startButton;
	private JTextArea taskOutput;
	private Task task;

	class Task extends SwingWorker<Void, Void> {
		@Override
		public Void doInBackground() {
			Random random = new Random();
			int progress = 0;
			setProgress(0);
			try {
				Thread.sleep(1000);
				while (progress < 100 && !isCancelled()) {
					// Sleep for up to one second.
					Thread.sleep(random.nextInt(1000));
					// Make random progress.
					progress += random.nextInt(10);
					setProgress(Math.min(progress, 100));
				}
			} catch (InterruptedException ignore) {
			}
			return null;
		}

		@Override
		public void done() {
			Toolkit.getDefaultToolkit().beep();
			startButton.setEnabled(true);
			progressMonitor.setProgress(0);
		}
	}

	public ProgressMonitorDemo() {
		super(new BorderLayout());

		// Create the demo's UI.
		startButton = new JButton("Start");
		startButton.setActionCommand("start");
		startButton.addActionListener(this);

		taskOutput = new JTextArea(5, 20);
		taskOutput.setMargin(new Insets(5, 5, 5, 5));
		taskOutput.setEditable(false);

		add(startButton, BorderLayout.PAGE_START);
		add(new JScrollPane(taskOutput), BorderLayout.CENTER);
		setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));

	}

	/**
	 * Invoked when the user presses the start button.
	 */
	public void actionPerformed(ActionEvent evt) {
		progressMonitor = new ProgressMonitor(ProgressMonitorDemo.this, "Running a Long Task", "", 0, 100);
		progressMonitor.setProgress(0);
		task = new Task();
		task.addPropertyChangeListener(this);
		task.execute();
		startButton.setEnabled(false);
	}

	/**
	 * Invoked when task's progress property changes.
	 */
	public void propertyChange(PropertyChangeEvent evt) {
		if ("progress" == evt.getPropertyName()) {
			int progress = (Integer) evt.getNewValue();
			progressMonitor.setProgress(progress);
			String message = String.format("Completed %d%%.\n", progress);
			progressMonitor.setNote(message);
			taskOutput.append(message);
			if (progressMonitor.isCanceled() || task.isDone()) {
				Toolkit.getDefaultToolkit().beep();
				if (progressMonitor.isCanceled()) {
					task.cancel(true);
					taskOutput.append("Task canceled.\n");
				} else {
					taskOutput.append("Task completed.\n");
				}
				startButton.setEnabled(true);
			}
		}

	}

	/**
	 * Create the GUI and show it. For thread safety, this method should be
	 * invoked from the event-dispatching thread.
	 */
	private static void createAndShowGUI() {
		// Create and set up the window.
		JFrame frame = new JFrame("ProgressMonitorDemo");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		// Create and set up the content pane.
		JComponent newContentPane = new ProgressMonitorDemo();
		newContentPane.setOpaque(true); // content panes must be opaque
		frame.setContentPane(newContentPane);

		// Display the window.
		frame.pack();
		frame.setVisible(true);
	}

	public static void main(String[] args) {
		// Schedule a job for the event-dispatching thread:
		// creating and showing this application's GUI.
		javax.swing.SwingUtilities.invokeLater(new Runnable() {
			public void run() {
				createAndShowGUI();
			}
		});
	}
}
